/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:54:46,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:54:46,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:54:46,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:54:46,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:54:46,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:54:46,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:54:46,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:54:46,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:54:46,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:54:46,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:54:46,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:54:46,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:54:46,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:54:46,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:54:46,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:54:46,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:54:46,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:54:46,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:54:46,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:54:46,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:54:46,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:54:46,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:54:46,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:54:46,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 18:54:46,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:54:46,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:54:46,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:54:46,184 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 18:54:46,224 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:54:46,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:54:46,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:54:46,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:54:46,228 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:54:46,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:54:46,228 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:54:46,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:54:46,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:54:46,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:54:46,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:54:46,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:54:46,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:54:46,231 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:54:46,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:54:46,231 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:54:46,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:54:46,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:54:46,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:54:46,232 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:54:46,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:54:46,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:54:46,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:54:46,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:54:46,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:54:46,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:54:46,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:54:46,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:54:46,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:54:46,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-08-21 18:54:46,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:54:46,552 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:54:46,556 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:54:46,557 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:54:46,558 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:54:46,559 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-08-21 18:54:46,629 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0cee045e0/838aec7bcf4642d7b657cc486b0ecba0/FLAG94dbf53da [2020-08-21 18:54:47,086 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:54:47,087 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-08-21 18:54:47,094 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0cee045e0/838aec7bcf4642d7b657cc486b0ecba0/FLAG94dbf53da [2020-08-21 18:54:47,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0cee045e0/838aec7bcf4642d7b657cc486b0ecba0 [2020-08-21 18:54:47,451 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:54:47,453 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:54:47,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:54:47,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:54:47,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:54:47,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:54:47" (1/1) ... [2020-08-21 18:54:47,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b9ac829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:47, skipping insertion in model container [2020-08-21 18:54:47,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:54:47" (1/1) ... [2020-08-21 18:54:47,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:54:47,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:54:47,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:54:47,653 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:54:47,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:54:47,687 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:54:47,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:47 WrapperNode [2020-08-21 18:54:47,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:54:47,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:54:47,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:54:47,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:54:47,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:47" (1/1) ... [2020-08-21 18:54:47,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:47" (1/1) ... [2020-08-21 18:54:47,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:47" (1/1) ... [2020-08-21 18:54:47,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:47" (1/1) ... [2020-08-21 18:54:47,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:47" (1/1) ... [2020-08-21 18:54:47,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:47" (1/1) ... [2020-08-21 18:54:47,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:47" (1/1) ... [2020-08-21 18:54:47,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:54:47,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:54:47,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:54:47,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:54:47,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:54:47,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:54:47,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:54:47,870 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-08-21 18:54:47,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:54:47,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:54:47,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:54:47,870 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-08-21 18:54:47,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:54:47,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:54:47,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:54:48,105 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:54:48,106 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 18:54:48,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:54:48 BoogieIcfgContainer [2020-08-21 18:54:48,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:54:48,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:54:48,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:54:48,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:54:48,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:54:47" (1/3) ... [2020-08-21 18:54:48,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abab329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:54:48, skipping insertion in model container [2020-08-21 18:54:48,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:47" (2/3) ... [2020-08-21 18:54:48,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abab329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:54:48, skipping insertion in model container [2020-08-21 18:54:48,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:54:48" (3/3) ... [2020-08-21 18:54:48,119 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-08-21 18:54:48,129 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:54:48,137 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:54:48,156 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:54:48,205 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:54:48,205 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:54:48,206 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:54:48,206 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:54:48,206 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:54:48,206 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:54:48,206 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:54:48,206 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:54:48,222 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-21 18:54:48,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 18:54:48,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:48,229 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:48,230 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:48,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:48,235 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2020-08-21 18:54:48,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:48,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616428715] [2020-08-21 18:54:48,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:48,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:48,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:48,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-21 18:54:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 18:54:48,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616428715] [2020-08-21 18:54:48,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:54:48,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 18:54:48,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315296282] [2020-08-21 18:54:48,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:54:48,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:48,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:54:48,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:54:48,535 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-08-21 18:54:48,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:48,741 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-08-21 18:54:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:54:48,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-08-21 18:54:48,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:48,764 INFO L225 Difference]: With dead ends: 41 [2020-08-21 18:54:48,764 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 18:54:48,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:54:48,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 18:54:48,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-21 18:54:48,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 18:54:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-08-21 18:54:48,837 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2020-08-21 18:54:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:48,837 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-08-21 18:54:48,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:54:48,838 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-08-21 18:54:48,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 18:54:48,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:48,841 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:48,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:54:48,842 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:48,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:48,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2020-08-21 18:54:48,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:48,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449107536] [2020-08-21 18:54:48,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:48,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:48,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:48,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:48,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 18:54:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 18:54:48,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449107536] [2020-08-21 18:54:48,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:54:48,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:54:48,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561267576] [2020-08-21 18:54:48,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:54:48,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:48,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:54:48,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:54:48,967 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2020-08-21 18:54:49,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:49,067 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-08-21 18:54:49,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:54:49,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-21 18:54:49,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:49,069 INFO L225 Difference]: With dead ends: 29 [2020-08-21 18:54:49,070 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 18:54:49,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:54:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 18:54:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-21 18:54:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 18:54:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-08-21 18:54:49,079 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2020-08-21 18:54:49,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:49,080 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-08-21 18:54:49,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:54:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-08-21 18:54:49,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 18:54:49,081 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:49,082 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:49,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:54:49,082 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:49,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:49,083 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2020-08-21 18:54:49,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:49,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252790165] [2020-08-21 18:54:49,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:49,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:49,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:49,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:49,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 18:54:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:49,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-21 18:54:49,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252790165] [2020-08-21 18:54:49,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:54:49,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 18:54:49,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386001937] [2020-08-21 18:54:49,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 18:54:49,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:49,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 18:54:49,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-08-21 18:54:49,620 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 15 states. [2020-08-21 18:54:49,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:49,985 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-08-21 18:54:49,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 18:54:49,985 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-08-21 18:54:49,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:49,987 INFO L225 Difference]: With dead ends: 43 [2020-08-21 18:54:49,987 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 18:54:49,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-08-21 18:54:49,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 18:54:50,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-08-21 18:54:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 18:54:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-08-21 18:54:50,002 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2020-08-21 18:54:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:50,003 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-08-21 18:54:50,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 18:54:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-08-21 18:54:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 18:54:50,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:50,006 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:50,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:54:50,006 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:50,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2020-08-21 18:54:50,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:50,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909315533] [2020-08-21 18:54:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:50,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:50,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:50,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:50,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 18:54:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:50,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:50,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:54:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-21 18:54:50,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909315533] [2020-08-21 18:54:50,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:54:50,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 18:54:50,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276543049] [2020-08-21 18:54:50,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:54:50,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:50,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:54:50,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:54:50,151 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 6 states. [2020-08-21 18:54:50,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:50,232 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2020-08-21 18:54:50,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 18:54:50,233 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-08-21 18:54:50,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:50,237 INFO L225 Difference]: With dead ends: 54 [2020-08-21 18:54:50,237 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 18:54:50,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:54:50,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 18:54:50,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-21 18:54:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 18:54:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-08-21 18:54:50,255 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 43 [2020-08-21 18:54:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:50,255 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-08-21 18:54:50,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:54:50,258 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-08-21 18:54:50,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-21 18:54:50,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:50,261 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:50,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:54:50,264 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:50,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:50,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2020-08-21 18:54:50,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:50,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128458593] [2020-08-21 18:54:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:50,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:50,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:50,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:50,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 18:54:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:50,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:50,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 18:54:50,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128458593] [2020-08-21 18:54:50,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:54:50,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 18:54:50,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582551784] [2020-08-21 18:54:50,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 18:54:50,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:50,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 18:54:50,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-08-21 18:54:50,752 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 19 states. [2020-08-21 18:54:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:51,190 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-08-21 18:54:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 18:54:51,191 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-08-21 18:54:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:51,193 INFO L225 Difference]: With dead ends: 39 [2020-08-21 18:54:51,193 INFO L226 Difference]: Without dead ends: 35 [2020-08-21 18:54:51,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-08-21 18:54:51,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-21 18:54:51,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-08-21 18:54:51,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-21 18:54:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-08-21 18:54:51,203 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 44 [2020-08-21 18:54:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:51,203 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-08-21 18:54:51,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 18:54:51,204 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-08-21 18:54:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 18:54:51,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:51,206 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:51,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:54:51,206 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:51,206 INFO L82 PathProgramCache]: Analyzing trace with hash 430867302, now seen corresponding path program 4 times [2020-08-21 18:54:51,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:51,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842595566] [2020-08-21 18:54:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:51,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:51,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:51,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:51,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 18:54:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:51,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:51,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:51,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-08-21 18:54:51,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842595566] [2020-08-21 18:54:51,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:54:51,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 18:54:51,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858580271] [2020-08-21 18:54:51,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 18:54:51,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:51,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 18:54:51,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-08-21 18:54:51,706 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 21 states. [2020-08-21 18:54:52,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:52,319 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-08-21 18:54:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 18:54:52,319 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-08-21 18:54:52,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:52,321 INFO L225 Difference]: With dead ends: 42 [2020-08-21 18:54:52,321 INFO L226 Difference]: Without dead ends: 38 [2020-08-21 18:54:52,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2020-08-21 18:54:52,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-21 18:54:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-21 18:54:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 18:54:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-08-21 18:54:52,331 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 51 [2020-08-21 18:54:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:52,332 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-08-21 18:54:52,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 18:54:52,332 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-08-21 18:54:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 18:54:52,333 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:52,333 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:52,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:54:52,334 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:52,334 INFO L82 PathProgramCache]: Analyzing trace with hash -272057979, now seen corresponding path program 5 times [2020-08-21 18:54:52,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:52,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548094818] [2020-08-21 18:54:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:52,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:52,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:52,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:52,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 18:54:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:52,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:52,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:52,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:52,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-08-21 18:54:52,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548094818] [2020-08-21 18:54:52,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:54:52,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 18:54:52,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279346668] [2020-08-21 18:54:52,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 18:54:52,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:52,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 18:54:52,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-08-21 18:54:52,884 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 23 states. [2020-08-21 18:54:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:53,728 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-21 18:54:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 18:54:53,729 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2020-08-21 18:54:53,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:53,731 INFO L225 Difference]: With dead ends: 45 [2020-08-21 18:54:53,731 INFO L226 Difference]: Without dead ends: 41 [2020-08-21 18:54:53,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 18:54:53,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-21 18:54:53,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-08-21 18:54:53,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-21 18:54:53,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-08-21 18:54:53,742 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 58 [2020-08-21 18:54:53,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:53,743 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-08-21 18:54:53,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 18:54:53,743 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-08-21 18:54:53,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-21 18:54:53,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:53,745 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:53,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:54:53,745 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:53,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1146349017, now seen corresponding path program 6 times [2020-08-21 18:54:53,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:53,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968168267] [2020-08-21 18:54:53,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:53,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:53,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:53,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:53,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:53,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 18:54:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:54,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:54,082 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 18:54:54,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968168267] [2020-08-21 18:54:54,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:54:54,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 18:54:54,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109915894] [2020-08-21 18:54:54,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 18:54:54,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:54,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 18:54:54,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-08-21 18:54:54,085 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 17 states. [2020-08-21 18:54:54,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:54,623 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2020-08-21 18:54:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 18:54:54,623 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-08-21 18:54:54,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:54,625 INFO L225 Difference]: With dead ends: 47 [2020-08-21 18:54:54,625 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 18:54:54,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2020-08-21 18:54:54,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 18:54:54,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-21 18:54:54,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 18:54:54,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2020-08-21 18:54:54,648 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 44 [2020-08-21 18:54:54,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:54,649 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2020-08-21 18:54:54,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 18:54:54,649 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2020-08-21 18:54:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 18:54:54,652 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:54,653 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:54,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:54:54,653 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:54,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:54,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1872336740, now seen corresponding path program 7 times [2020-08-21 18:54:54,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:54,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792216288] [2020-08-21 18:54:54,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:54,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:54,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:54,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:54,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:54,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 18:54:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:54,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:54,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-08-21 18:54:54,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792216288] [2020-08-21 18:54:54,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:54:54,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 18:54:54,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380306385] [2020-08-21 18:54:54,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 18:54:54,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:54,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 18:54:54,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-08-21 18:54:54,990 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand 15 states. [2020-08-21 18:54:55,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:55,326 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2020-08-21 18:54:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 18:54:55,327 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-08-21 18:54:55,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:55,329 INFO L225 Difference]: With dead ends: 47 [2020-08-21 18:54:55,329 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 18:54:55,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-08-21 18:54:55,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 18:54:55,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-21 18:54:55,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 18:54:55,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-08-21 18:54:55,339 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 51 [2020-08-21 18:54:55,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:55,339 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-08-21 18:54:55,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 18:54:55,340 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-08-21 18:54:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 18:54:55,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:55,341 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:55,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:54:55,341 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:55,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:55,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1605933725, now seen corresponding path program 8 times [2020-08-21 18:54:55,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:55,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391025338] [2020-08-21 18:54:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:55,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:55,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:55,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:55,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:55,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 18:54:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:55,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:55,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:55,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-08-21 18:54:55,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391025338] [2020-08-21 18:54:55,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:54:55,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 18:54:55,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307491610] [2020-08-21 18:54:55,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 18:54:55,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:55,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 18:54:55,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-08-21 18:54:55,875 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 22 states. [2020-08-21 18:54:56,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:56,513 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-08-21 18:54:56,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 18:54:56,514 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-21 18:54:56,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:56,516 INFO L225 Difference]: With dead ends: 47 [2020-08-21 18:54:56,516 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 18:54:56,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-08-21 18:54:56,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 18:54:56,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-21 18:54:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 18:54:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2020-08-21 18:54:56,525 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 58 [2020-08-21 18:54:56,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:56,526 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2020-08-21 18:54:56,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 18:54:56,526 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2020-08-21 18:54:56,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 18:54:56,527 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:56,527 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:56,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 18:54:56,528 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:56,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:56,528 INFO L82 PathProgramCache]: Analyzing trace with hash 921134702, now seen corresponding path program 9 times [2020-08-21 18:54:56,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:56,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20083928] [2020-08-21 18:54:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:56,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:56,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:56,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:56,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:56,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 18:54:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:56,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:56,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:57,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:57,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-08-21 18:54:57,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20083928] [2020-08-21 18:54:57,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:54:57,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 18:54:57,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723364994] [2020-08-21 18:54:57,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 18:54:57,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:57,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 18:54:57,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-08-21 18:54:57,180 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand 24 states. [2020-08-21 18:54:58,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:58,073 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-08-21 18:54:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 18:54:58,074 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-08-21 18:54:58,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:58,076 INFO L225 Difference]: With dead ends: 47 [2020-08-21 18:54:58,076 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 18:54:58,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 18:54:58,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 18:54:58,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-08-21 18:54:58,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-21 18:54:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-08-21 18:54:58,085 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 65 [2020-08-21 18:54:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:58,085 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-08-21 18:54:58,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 18:54:58,086 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-08-21 18:54:58,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 18:54:58,087 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:58,087 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:58,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 18:54:58,087 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:58,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:58,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1602258660, now seen corresponding path program 10 times [2020-08-21 18:54:58,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:58,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601608636] [2020-08-21 18:54:58,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:58,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:58,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:58,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:58,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 18:54:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:58,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:58,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:58,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:58,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:58,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 11 proven. 95 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-21 18:54:58,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601608636] [2020-08-21 18:54:58,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:54:58,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 18:54:58,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084756941] [2020-08-21 18:54:58,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 18:54:58,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:58,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 18:54:58,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-08-21 18:54:58,727 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 25 states. [2020-08-21 18:54:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:59,724 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-08-21 18:54:59,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 18:54:59,724 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2020-08-21 18:54:59,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:59,727 INFO L225 Difference]: With dead ends: 50 [2020-08-21 18:54:59,727 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 18:54:59,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 18:54:59,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 18:54:59,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-21 18:54:59,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 18:54:59,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-21 18:54:59,746 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 65 [2020-08-21 18:54:59,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:59,750 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-21 18:54:59,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 18:54:59,750 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-21 18:54:59,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 18:54:59,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:59,752 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:59,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 18:54:59,752 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:59,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:59,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1850137581, now seen corresponding path program 11 times [2020-08-21 18:54:59,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:59,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740911605] [2020-08-21 18:54:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:59,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:59,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:59,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:59,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:00,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 18:55:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:00,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:00,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:00,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:00,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:00,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-21 18:55:00,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740911605] [2020-08-21 18:55:00,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:00,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 18:55:00,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028879545] [2020-08-21 18:55:00,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 18:55:00,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:00,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 18:55:00,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-21 18:55:00,483 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 26 states. [2020-08-21 18:55:01,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:01,626 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-08-21 18:55:01,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 18:55:01,627 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-21 18:55:01,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:01,628 INFO L225 Difference]: With dead ends: 50 [2020-08-21 18:55:01,629 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 18:55:01,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2020-08-21 18:55:01,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 18:55:01,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-21 18:55:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 18:55:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-08-21 18:55:01,636 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 72 [2020-08-21 18:55:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:01,637 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-08-21 18:55:01,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 18:55:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-08-21 18:55:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 18:55:01,638 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:01,638 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:01,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 18:55:01,639 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:01,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:01,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1677321585, now seen corresponding path program 12 times [2020-08-21 18:55:01,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:01,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192905738] [2020-08-21 18:55:01,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:01,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:01,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:01,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:01,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:01,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:01,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 18:55:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:02,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:02,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:02,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:02,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-21 18:55:02,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192905738] [2020-08-21 18:55:02,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:02,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 18:55:02,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286327167] [2020-08-21 18:55:02,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 18:55:02,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:02,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 18:55:02,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-21 18:55:02,410 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 26 states. [2020-08-21 18:55:03,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:03,556 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-08-21 18:55:03,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 18:55:03,557 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-21 18:55:03,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:03,558 INFO L225 Difference]: With dead ends: 50 [2020-08-21 18:55:03,558 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 18:55:03,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 18:55:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 18:55:03,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-21 18:55:03,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 18:55:03,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-08-21 18:55:03,568 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 72 [2020-08-21 18:55:03,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:03,569 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-08-21 18:55:03,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 18:55:03,569 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2020-08-21 18:55:03,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 18:55:03,570 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:03,570 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:03,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 18:55:03,571 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:03,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:03,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1255254341, now seen corresponding path program 13 times [2020-08-21 18:55:03,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:03,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765431676] [2020-08-21 18:55:03,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:03,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:03,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:03,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:03,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:03,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:03,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 18:55:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:04,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:04,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-08-21 18:55:04,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765431676] [2020-08-21 18:55:04,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:04,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 18:55:04,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223470080] [2020-08-21 18:55:04,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 18:55:04,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:04,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 18:55:04,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-08-21 18:55:04,176 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 22 states. [2020-08-21 18:55:04,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:04,887 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2020-08-21 18:55:04,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 18:55:04,888 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-21 18:55:04,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:04,890 INFO L225 Difference]: With dead ends: 50 [2020-08-21 18:55:04,890 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 18:55:04,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-08-21 18:55:04,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 18:55:04,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-21 18:55:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 18:55:04,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2020-08-21 18:55:04,898 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 58 [2020-08-21 18:55:04,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:04,898 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2020-08-21 18:55:04,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 18:55:04,898 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2020-08-21 18:55:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 18:55:04,899 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:04,900 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:04,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 18:55:04,900 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:04,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:04,900 INFO L82 PathProgramCache]: Analyzing trace with hash 912513436, now seen corresponding path program 14 times [2020-08-21 18:55:04,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:04,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990717775] [2020-08-21 18:55:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:04,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:04,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:05,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:05,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:05,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:05,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 18:55:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:05,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:05,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:05,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 82 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-21 18:55:05,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990717775] [2020-08-21 18:55:05,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:05,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 18:55:05,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127872945] [2020-08-21 18:55:05,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 18:55:05,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:05,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 18:55:05,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-21 18:55:05,286 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand 17 states. [2020-08-21 18:55:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:05,843 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2020-08-21 18:55:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 18:55:05,844 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-08-21 18:55:05,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:05,845 INFO L225 Difference]: With dead ends: 50 [2020-08-21 18:55:05,845 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 18:55:05,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-21 18:55:05,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 18:55:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-21 18:55:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 18:55:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2020-08-21 18:55:05,852 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 58 transitions. Word has length 65 [2020-08-21 18:55:05,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:05,852 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 58 transitions. [2020-08-21 18:55:05,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 18:55:05,852 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 58 transitions. [2020-08-21 18:55:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 18:55:05,853 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:05,853 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:05,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 18:55:05,854 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:05,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2039564078, now seen corresponding path program 15 times [2020-08-21 18:55:05,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:05,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991004871] [2020-08-21 18:55:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:05,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:05,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:05,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:06,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:06,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:06,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 18:55:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:06,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:06,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:06,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:06,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:06,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-08-21 18:55:06,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991004871] [2020-08-21 18:55:06,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:06,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 18:55:06,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206909330] [2020-08-21 18:55:06,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 18:55:06,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:06,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 18:55:06,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-08-21 18:55:06,724 INFO L87 Difference]: Start difference. First operand 42 states and 58 transitions. Second operand 28 states. [2020-08-21 18:55:08,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:08,021 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-08-21 18:55:08,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 18:55:08,021 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-21 18:55:08,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:08,023 INFO L225 Difference]: With dead ends: 50 [2020-08-21 18:55:08,023 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 18:55:08,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2020-08-21 18:55:08,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 18:55:08,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-21 18:55:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 18:55:08,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-21 18:55:08,030 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 79 [2020-08-21 18:55:08,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:08,031 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-21 18:55:08,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 18:55:08,031 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-21 18:55:08,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 18:55:08,032 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:08,032 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:08,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 18:55:08,033 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:08,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:08,033 INFO L82 PathProgramCache]: Analyzing trace with hash -746065050, now seen corresponding path program 16 times [2020-08-21 18:55:08,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:08,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482876419] [2020-08-21 18:55:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:08,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:08,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:08,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:08,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:08,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:08,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 18:55:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:08,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-08-21 18:55:08,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482876419] [2020-08-21 18:55:08,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:08,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 18:55:08,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358682020] [2020-08-21 18:55:08,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 18:55:08,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:08,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 18:55:08,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-08-21 18:55:08,444 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 19 states. [2020-08-21 18:55:09,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:09,123 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-08-21 18:55:09,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 18:55:09,124 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-08-21 18:55:09,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:09,125 INFO L225 Difference]: With dead ends: 50 [2020-08-21 18:55:09,126 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 18:55:09,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2020-08-21 18:55:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 18:55:09,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-21 18:55:09,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 18:55:09,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-08-21 18:55:09,135 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 51 [2020-08-21 18:55:09,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:09,135 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-08-21 18:55:09,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 18:55:09,135 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-08-21 18:55:09,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 18:55:09,136 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:09,137 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:09,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 18:55:09,137 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:09,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:09,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1124697265, now seen corresponding path program 17 times [2020-08-21 18:55:09,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:09,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156337216] [2020-08-21 18:55:09,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:09,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:09,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:09,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:09,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 18:55:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:09,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:09,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:09,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:09,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:09,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:09,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 13 proven. 121 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-08-21 18:55:09,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156337216] [2020-08-21 18:55:09,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:09,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 18:55:09,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539081009] [2020-08-21 18:55:10,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 18:55:10,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:10,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 18:55:10,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2020-08-21 18:55:10,001 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 27 states. [2020-08-21 18:55:11,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:11,230 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-08-21 18:55:11,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 18:55:11,231 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2020-08-21 18:55:11,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:11,232 INFO L225 Difference]: With dead ends: 53 [2020-08-21 18:55:11,232 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 18:55:11,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2020-08-21 18:55:11,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 18:55:11,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-21 18:55:11,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 18:55:11,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-21 18:55:11,240 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 72 [2020-08-21 18:55:11,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:11,240 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-21 18:55:11,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 18:55:11,241 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-21 18:55:11,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 18:55:11,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:11,242 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:11,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 18:55:11,242 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:11,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:11,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1806425208, now seen corresponding path program 18 times [2020-08-21 18:55:11,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:11,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818545902] [2020-08-21 18:55:11,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:11,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:11,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:11,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:11,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:11,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 18:55:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:11,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:11,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:11,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:11,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:11,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:12,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-08-21 18:55:12,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818545902] [2020-08-21 18:55:12,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:12,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 18:55:12,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698012964] [2020-08-21 18:55:12,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 18:55:12,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:12,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 18:55:12,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-08-21 18:55:12,083 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 28 states. [2020-08-21 18:55:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:13,431 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2020-08-21 18:55:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 18:55:13,431 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-21 18:55:13,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:13,433 INFO L225 Difference]: With dead ends: 55 [2020-08-21 18:55:13,433 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 18:55:13,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2020-08-21 18:55:13,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 18:55:13,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-08-21 18:55:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 18:55:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-21 18:55:13,441 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 79 [2020-08-21 18:55:13,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:13,441 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-21 18:55:13,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 18:55:13,442 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-21 18:55:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 18:55:13,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:13,443 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:13,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 18:55:13,443 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:13,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:13,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1615348441, now seen corresponding path program 19 times [2020-08-21 18:55:13,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:13,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891756503] [2020-08-21 18:55:13,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:13,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:13,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:13,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:13,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:13,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:13,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 18:55:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:13,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:14,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:14,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:14,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:14,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:14,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-21 18:55:14,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891756503] [2020-08-21 18:55:14,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:14,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-21 18:55:14,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786242824] [2020-08-21 18:55:14,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-21 18:55:14,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:14,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-21 18:55:14,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-21 18:55:14,598 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 30 states. [2020-08-21 18:55:16,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:16,213 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-08-21 18:55:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 18:55:16,219 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-21 18:55:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:16,221 INFO L225 Difference]: With dead ends: 53 [2020-08-21 18:55:16,221 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 18:55:16,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=169, Invalid=1811, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 18:55:16,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 18:55:16,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-08-21 18:55:16,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 18:55:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-08-21 18:55:16,237 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 86 [2020-08-21 18:55:16,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:16,237 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-08-21 18:55:16,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-21 18:55:16,238 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-08-21 18:55:16,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 18:55:16,239 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:16,240 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:16,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 18:55:16,240 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:16,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:16,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1524702692, now seen corresponding path program 20 times [2020-08-21 18:55:16,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:16,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993112957] [2020-08-21 18:55:16,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:16,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:16,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:16,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:16,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:16,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:16,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:16,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 18:55:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:16,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:16,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:16,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:16,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 134 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-08-21 18:55:16,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993112957] [2020-08-21 18:55:16,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:16,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 18:55:16,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627144030] [2020-08-21 18:55:16,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 18:55:16,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:16,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 18:55:16,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-08-21 18:55:16,775 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 19 states. [2020-08-21 18:55:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:17,615 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2020-08-21 18:55:17,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 18:55:17,618 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-08-21 18:55:17,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:17,619 INFO L225 Difference]: With dead ends: 53 [2020-08-21 18:55:17,620 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 18:55:17,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2020-08-21 18:55:17,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 18:55:17,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-21 18:55:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 18:55:17,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 66 transitions. [2020-08-21 18:55:17,632 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 66 transitions. Word has length 79 [2020-08-21 18:55:17,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:17,633 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 66 transitions. [2020-08-21 18:55:17,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 18:55:17,633 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 66 transitions. [2020-08-21 18:55:17,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 18:55:17,636 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:17,636 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:17,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 18:55:17,636 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:17,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:17,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1830896665, now seen corresponding path program 21 times [2020-08-21 18:55:17,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:17,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609936794] [2020-08-21 18:55:17,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:17,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:17,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:17,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:17,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:17,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:18,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:18,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 18:55:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:18,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:18,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:18,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 22 proven. 119 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-21 18:55:18,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609936794] [2020-08-21 18:55:18,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:18,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 18:55:18,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984363410] [2020-08-21 18:55:18,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 18:55:18,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:18,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 18:55:18,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-21 18:55:18,433 INFO L87 Difference]: Start difference. First operand 45 states and 66 transitions. Second operand 26 states. [2020-08-21 18:55:19,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:19,703 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2020-08-21 18:55:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 18:55:19,705 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-21 18:55:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:19,706 INFO L225 Difference]: With dead ends: 53 [2020-08-21 18:55:19,706 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 18:55:19,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 18:55:19,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 18:55:19,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-21 18:55:19,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 18:55:19,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 65 transitions. [2020-08-21 18:55:19,714 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 65 transitions. Word has length 72 [2020-08-21 18:55:19,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:19,715 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 65 transitions. [2020-08-21 18:55:19,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 18:55:19,715 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 65 transitions. [2020-08-21 18:55:19,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 18:55:19,716 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:19,716 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:19,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 18:55:19,716 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:19,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:19,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2003180303, now seen corresponding path program 22 times [2020-08-21 18:55:19,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:19,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841928840] [2020-08-21 18:55:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:19,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:19,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:19,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:19,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:19,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:20,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:20,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 18:55:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:20,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-08-21 18:55:20,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841928840] [2020-08-21 18:55:20,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:20,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 18:55:20,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475764898] [2020-08-21 18:55:20,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 18:55:20,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:20,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 18:55:20,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-08-21 18:55:20,234 INFO L87 Difference]: Start difference. First operand 45 states and 65 transitions. Second operand 21 states. [2020-08-21 18:55:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:21,130 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2020-08-21 18:55:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 18:55:21,131 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-08-21 18:55:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:21,133 INFO L225 Difference]: With dead ends: 53 [2020-08-21 18:55:21,133 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 18:55:21,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 18:55:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 18:55:21,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-21 18:55:21,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 18:55:21,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-08-21 18:55:21,145 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 58 [2020-08-21 18:55:21,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:21,146 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-08-21 18:55:21,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 18:55:21,146 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-08-21 18:55:21,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 18:55:21,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:21,150 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:21,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 18:55:21,151 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:21,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:21,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1394734426, now seen corresponding path program 23 times [2020-08-21 18:55:21,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:21,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046233986] [2020-08-21 18:55:21,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:21,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:21,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:21,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:21,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:21,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:21,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:21,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 18:55:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:21,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:21,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-08-21 18:55:21,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046233986] [2020-08-21 18:55:21,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:21,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 18:55:21,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457133167] [2020-08-21 18:55:21,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 18:55:21,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:21,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 18:55:21,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-08-21 18:55:21,878 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 24 states. [2020-08-21 18:55:22,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:22,902 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2020-08-21 18:55:22,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 18:55:22,903 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-08-21 18:55:22,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:22,904 INFO L225 Difference]: With dead ends: 53 [2020-08-21 18:55:22,904 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 18:55:22,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 18:55:22,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 18:55:22,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-21 18:55:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 18:55:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2020-08-21 18:55:22,911 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 65 [2020-08-21 18:55:22,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:22,912 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2020-08-21 18:55:22,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 18:55:22,912 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2020-08-21 18:55:22,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 18:55:22,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:22,913 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:22,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 18:55:22,913 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:22,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:22,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1937884195, now seen corresponding path program 24 times [2020-08-21 18:55:22,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:22,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324419258] [2020-08-21 18:55:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:22,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:22,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:23,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:23,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:23,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:23,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:23,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 18:55:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:23,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:23,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:23,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:23,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:23,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-21 18:55:23,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324419258] [2020-08-21 18:55:23,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:23,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-21 18:55:23,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548571453] [2020-08-21 18:55:23,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-21 18:55:23,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:23,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-21 18:55:23,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-21 18:55:23,940 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand 30 states. [2020-08-21 18:55:25,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:25,435 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-08-21 18:55:25,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 18:55:25,436 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-21 18:55:25,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:25,437 INFO L225 Difference]: With dead ends: 53 [2020-08-21 18:55:25,437 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 18:55:25,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2020-08-21 18:55:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 18:55:25,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-21 18:55:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 18:55:25,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-21 18:55:25,443 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 86 [2020-08-21 18:55:25,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:25,444 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-21 18:55:25,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-21 18:55:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-21 18:55:25,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 18:55:25,445 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:25,445 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:25,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 18:55:25,445 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:25,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:25,446 INFO L82 PathProgramCache]: Analyzing trace with hash -335786642, now seen corresponding path program 25 times [2020-08-21 18:55:25,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:25,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946768745] [2020-08-21 18:55:25,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:25,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:25,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:25,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:25,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:25,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:25,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:25,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 18:55:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:25,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:26,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:26,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:26,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:26,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:26,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-08-21 18:55:26,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946768745] [2020-08-21 18:55:26,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:26,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-21 18:55:26,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655526713] [2020-08-21 18:55:26,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-21 18:55:26,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:26,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-21 18:55:26,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=924, Unknown=0, NotChecked=0, Total=992 [2020-08-21 18:55:26,599 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 32 states. [2020-08-21 18:55:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:28,295 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-08-21 18:55:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 18:55:28,296 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-08-21 18:55:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:28,297 INFO L225 Difference]: With dead ends: 53 [2020-08-21 18:55:28,297 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 18:55:28,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=175, Invalid=1987, Unknown=0, NotChecked=0, Total=2162 [2020-08-21 18:55:28,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 18:55:28,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-08-21 18:55:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 18:55:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-08-21 18:55:28,305 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 93 [2020-08-21 18:55:28,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:28,305 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-08-21 18:55:28,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-21 18:55:28,306 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-08-21 18:55:28,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 18:55:28,306 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:28,307 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:28,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 18:55:28,307 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:28,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:28,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1266374702, now seen corresponding path program 26 times [2020-08-21 18:55:28,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:28,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135973941] [2020-08-21 18:55:28,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:28,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:28,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:28,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:28,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 18:55:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:28,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:28,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:28,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:28,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:29,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:29,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:29,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-08-21 18:55:29,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135973941] [2020-08-21 18:55:29,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:29,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 18:55:29,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230929723] [2020-08-21 18:55:29,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 18:55:29,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:29,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 18:55:29,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2020-08-21 18:55:29,552 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 29 states. [2020-08-21 18:55:31,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:31,304 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-08-21 18:55:31,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 18:55:31,304 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-08-21 18:55:31,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:31,305 INFO L225 Difference]: With dead ends: 56 [2020-08-21 18:55:31,305 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 18:55:31,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2020-08-21 18:55:31,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 18:55:31,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-08-21 18:55:31,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 18:55:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-21 18:55:31,317 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 79 [2020-08-21 18:55:31,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:31,319 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-21 18:55:31,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 18:55:31,319 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-21 18:55:31,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 18:55:31,320 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:31,320 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:31,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 18:55:31,321 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:31,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:31,321 INFO L82 PathProgramCache]: Analyzing trace with hash -180332919, now seen corresponding path program 27 times [2020-08-21 18:55:31,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:31,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101199727] [2020-08-21 18:55:31,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:31,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:31,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:31,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:31,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:31,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 18:55:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:31,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:31,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:31,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:31,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:32,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:32,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:32,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-21 18:55:32,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101199727] [2020-08-21 18:55:32,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:32,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-21 18:55:32,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011780299] [2020-08-21 18:55:32,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-21 18:55:32,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:32,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-21 18:55:32,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-21 18:55:32,569 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 30 states. [2020-08-21 18:55:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:34,364 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-08-21 18:55:34,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 18:55:34,365 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-21 18:55:34,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:34,367 INFO L225 Difference]: With dead ends: 58 [2020-08-21 18:55:34,367 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 18:55:34,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=181, Invalid=1981, Unknown=0, NotChecked=0, Total=2162 [2020-08-21 18:55:34,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 18:55:34,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-08-21 18:55:34,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 18:55:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-21 18:55:34,376 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 86 [2020-08-21 18:55:34,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:34,376 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-21 18:55:34,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-21 18:55:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-21 18:55:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 18:55:34,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:34,378 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:34,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 18:55:34,378 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:34,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:34,379 INFO L82 PathProgramCache]: Analyzing trace with hash -313052920, now seen corresponding path program 28 times [2020-08-21 18:55:34,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:34,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164173285] [2020-08-21 18:55:34,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:34,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:34,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:34,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:34,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:34,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:34,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 18:55:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:34,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:34,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:35,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:35,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:35,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:35,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:35,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-08-21 18:55:35,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164173285] [2020-08-21 18:55:35,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:35,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-21 18:55:35,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646120869] [2020-08-21 18:55:35,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-21 18:55:35,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:35,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-21 18:55:35,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=924, Unknown=0, NotChecked=0, Total=992 [2020-08-21 18:55:35,682 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 32 states. [2020-08-21 18:55:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:55:37,490 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-08-21 18:55:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 18:55:37,492 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-08-21 18:55:37,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:55:37,493 INFO L225 Difference]: With dead ends: 58 [2020-08-21 18:55:37,493 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 18:55:37,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=187, Invalid=2165, Unknown=0, NotChecked=0, Total=2352 [2020-08-21 18:55:37,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 18:55:37,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-08-21 18:55:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 18:55:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-21 18:55:37,500 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 93 [2020-08-21 18:55:37,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:55:37,500 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-21 18:55:37,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-21 18:55:37,500 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-21 18:55:37,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-21 18:55:37,501 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:55:37,501 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:55:37,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 18:55:37,502 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:55:37,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:55:37,502 INFO L82 PathProgramCache]: Analyzing trace with hash -789379885, now seen corresponding path program 29 times [2020-08-21 18:55:37,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:55:37,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522267171] [2020-08-21 18:55:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:55:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:37,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:55:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:37,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:55:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:37,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:37,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:37,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:37,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:38,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 18:55:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:38,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:38,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:38,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:38,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:38,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:38,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:38,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:38,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:55:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:55:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-08-21 18:55:38,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522267171] [2020-08-21 18:55:38,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:55:38,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-21 18:55:38,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84227458] [2020-08-21 18:55:38,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-21 18:55:38,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:55:38,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-21 18:55:38,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1050, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 18:55:38,979 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 34 states.